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18 <pre class="prettyprint lang-js"><span id='Ext-layout-component-Button'>/**
19 </span> * Component layout for buttons
20 * @class Ext.layout.component.Button
21 * @extends Ext.layout.component.Component
24 Ext.define('Ext.layout.component.Button', {
26 /* Begin Definitions */
28 alias: ['layout.button'],
30 extend: 'Ext.layout.component.Component',
36 cellClsRE: /-btn-(tl|br)\b/,
39 beforeLayout: function() {
40 return this.callParent(arguments) || this.lastText !== this.owner.text;
43 <span id='Ext-layout-component-Button-method-onLayout'> /**
44 </span> * Set the dimensions of the inner &lt;button&gt; element to match the
45 * component dimensions.
47 onLayout: function(width, height) {
53 btnInnerEl = owner.btnInnerEl,
54 btnIconEl = owner.btnIconEl,
55 sizeIconEl = (owner.icon || owner.iconCls) && (owner.iconAlign == "top" || owner.iconAlign == "bottom"),
56 minWidth = owner.minWidth,
57 maxWidth = owner.maxWidth,
58 ownerWidth, btnFrameWidth, metrics;
61 me.callParent(arguments);
64 me.setTargetSize(width, height);
67 // In IE7 strict mode button elements with width:auto get strange extra side margins within
68 // the wrapping table cell, but they go away if the width is explicitly set. So we measure
69 // the size of the text and set the width to match.
70 if (owner.text && (Ext.isIE6 || Ext.isIE7) && Ext.isStrict && btnEl && btnEl.getWidth() > 20) {
71 btnFrameWidth = me.btnFrameWidth;
72 metrics = Ext.util.TextMetrics.measure(btnInnerEl, owner.text);
73 ownerEl.setWidth(metrics.width + btnFrameWidth + me.adjWidth);
74 btnEl.setWidth(metrics.width + btnFrameWidth);
75 btnInnerEl.setWidth(metrics.width + btnFrameWidth);
78 btnIconEl.setWidth(metrics.width + btnFrameWidth);
81 // Remove any previous fixed widths
82 ownerEl.setWidth(null);
84 btnInnerEl.setWidth(null);
85 btnIconEl.setWidth(null);
88 // Handle maxWidth/minWidth config
89 if (minWidth || maxWidth) {
90 ownerWidth = ownerEl.getWidth();
91 if (minWidth && (ownerWidth < minWidth)) {
92 me.setTargetSize(minWidth, height);
94 else if (maxWidth && (ownerWidth > maxWidth)) {
96 me.setTargetSize(maxWidth, height);
101 this.lastText = owner.text;
104 setTargetSize: function(width, height) {
107 isNum = Ext.isNumber,
108 btnInnerEl = owner.btnInnerEl,
109 btnWidth = (isNum(width) ? width - me.adjWidth : width),
110 btnHeight = (isNum(height) ? height - me.adjHeight : height),
111 btnFrameHeight = me.btnFrameHeight,
112 text = owner.getText(),
115 me.callParent(arguments);
116 me.setElementSize(owner.btnEl, btnWidth, btnHeight);
117 me.setElementSize(btnInnerEl, btnWidth, btnHeight);
118 if (btnHeight >= 0) {
119 btnInnerEl.setStyle('line-height', btnHeight - btnFrameHeight + 'px');
122 // Button text may contain markup that would force it to wrap to more than one line (e.g. 'Button<br>Label').
123 // When this happens, we cannot use the line-height set above for vertical centering; we instead reset the
124 // line-height to normal, measure the rendered text height, and add padding-top to center the text block
125 // vertically within the button's height. This is more expensive than the basic line-height approach so
126 // we only do it if the text contains markup.
127 if (text && this.htmlRE.test(text)) {
128 btnInnerEl.setStyle('line-height', 'normal');
129 textHeight = Ext.util.TextMetrics.measure(btnInnerEl, text).height;
130 btnInnerEl.setStyle('padding-top', me.btnFrameTop + Math.max(btnInnerEl.getHeight() - btnFrameHeight - textHeight, 0) / 2 + 'px');
131 me.setElementSize(btnInnerEl, btnWidth, btnHeight);
135 getTargetInfo: function() {
139 frameSize = me.frameSize,
140 frameBody = owner.frameBody,
141 btnWrap = owner.btnWrap,
142 innerEl = owner.btnInnerEl;
144 if (!('adjWidth' in me)) {
146 // Width adjustment must take into account the arrow area. The btnWrap is the <em> which has padding to accommodate the arrow.
147 adjWidth: frameSize.left + frameSize.right + ownerEl.getBorderWidth('lr') + ownerEl.getPadding('lr') +
148 btnWrap.getPadding('lr') + (frameBody ? frameBody.getFrameWidth('lr') : 0),
149 adjHeight: frameSize.top + frameSize.bottom + ownerEl.getBorderWidth('tb') + ownerEl.getPadding('tb') +
150 btnWrap.getPadding('tb') + (frameBody ? frameBody.getFrameWidth('tb') : 0),
151 btnFrameWidth: innerEl.getFrameWidth('lr'),
152 btnFrameHeight: innerEl.getFrameWidth('tb'),
153 btnFrameTop: innerEl.getFrameWidth('t')
157 return me.callParent();